The dermatologist's procedure was introduced in 1972 by employers' liability insurance funds in the industrial, agricultural, and public sectors of Germany's statutory occupational accident insurance as a "procedure for early detection of occupational skin diseases." So far, it is still the most relevant tool for secondary prevention in occupational dermatology in Germany. According to the intention of this procedure, insured persons with a skin disease in which an occupational etiology is suspected must be offered preventive measures and, if necessary, given appropriate treatment to avoid job-loss. To improve the efficiency of the "classic" dermatologist's procedure, in 1999, on the initiative of the Central Federation of Industrial Professional Associations, a study group was founded in cooperation with the Task Force on Occupational and Environmental Dermatology of the German Dermatological Society and the Professional Organisation of German Dermatologists. In October 2002, a controlled intervention study started in North-western Germany to scientifically evaluate the "optimised" dermatologist's procedure, which was proposed by the study group and compare it to the standard ("classic") procedure. The study results should allow detailed suggestions for an improved dermatologist's procedure before it is introduced nationwide.